go into My Computer, right-click on your device, click Copy, navigate to the place on your HD that you want the files, right-click, and click Paste.
Very simple!
You can also paste the data directly onto the new device, instead of using your HD.

I don't know why this was downvoted, since this would work - the files are stored right on the iPod file system. They're renamed, but they still have all of the ID3 tags.
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BreakthroughAug 2 '11 at 21:41

yep. the iPod (to the computer) is just a fancy external HD
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Nate KoppenhaverAug 2 '11 at 22:22

iPod != iPod Touch. In forums I see that this matters a lot. I don't see my iPod Touch as a drive. I just want to download the music from a Touch, nothing more. I've even installed iTunes, I'm using Win 8.1.
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Csaba TothJan 6 '14 at 2:13